The remote controller holder can secure the mobile device. The Fly app on the mobile device displays high-definition camera feed in real-time The holder secures your mobile device, allowing you to view high-definition camera feed in real-time via the DJI Fly app on your mobile device. Specifications Max Operating Time: Approx. 3.5 hours* Charging Time: Approx. 2 hours Without charging any mobile device. Compatibility:for DJI Mini 5 Pro/DJI Air 3S/DJI Air 3/DJI Mini 4 Pro/DJI Neo (The product printed words may vary depending on the batch, but this does not affect use) Color: As Shown Material: plastic Package Contents: 1*Digital Transmission Module 1*RC-N3 Remote Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.